??????
?????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??????
??
??????????
??????????
??
????:
1???????vx:??????
2???????????
3????????
4?100?4?????
5????????4???
????
6
%
???:??